KR100800284B1 - Permeability film - Google Patents

Abstract

The present invention relates to a breathable film using a composition for a breathable film that reduces pinholes and has a long lasting direction, and relates to a breathable film that reduces pinholes and can last for a long time. More specifically, the present invention is 5 to 10% by weight of low density polyethylene, 30 to 50% by weight of linear low density polyethylene, 40 to 60% by weight of inorganic filler, 1 to 10% by weight of ethylene-ethyl acrylate copolymer (EEA), titanium dioxide 1 to 5% by weight, using a composition comprising 1 to 5% by weight of a breathable film, characterized in that the uniaxial or biaxial stretching produced by extrusion into one or more films using a T-die or blown extruder It is about.

Breathable Film, Inorganic Filler, Aroma, Porous Polyolefin

Description

Permeability film with long lasting pinhole reduction and scent

The present invention relates to a breathable film using the composition for a breathable film that lasts for a long time, to a pinhole and to a breathable film that can last for a long time.

There are many methods for producing a breathable or porous film, but among them, the most economical and commercially available method is to mix inorganic fillers with polyolefin resins to form interfacial separation between resins and fillers by uniaxial or biaxial stretching after film molding. To form fine holes.

However, the conventional breathable film has a problem that the pinhole occurs frequently, the productivity is low, and in the case of the film having a fragrance, the fragrance is easily lost.

Accordingly, the present invention is to use a dry blend of the fragrant raw materials in porous polyolefin or porous inorganic material at room temperature in the manufacture of a breathable film, to minimize the loss of fragrance by absorbing the fragrance into the pores, breathable to reduce costs The purpose is to provide a film.

In another aspect, the present invention provides a breathable multi-layer film having a feature of reducing the pinholes can be produced in economical breathable film that can be made of more than one layer of long fragrance duration, minimizing the transition to other materials Its purpose is.

Composition of the present invention for achieving the above object is a breathable film composition, low density polyethylene 5 to 10% by weight, linear low density polyethylene 30 to 50% by weight, inorganic filler 40 to 60% by weight, ethylene-ethyl acrylate copolymer ( EEA), uniaxial or biaxial, extruded into one or more films using a T-die or blown extruder using a composition comprising 1 to 10% by weight, 1 to 5% by weight of titanium dioxide, and 1 to 5% by weight of a preparation The present invention relates to a breathable film, which is prepared by stretching, and has a feature of reducing pinholes when manufactured in a multilayer using EEA.

That is, the present invention can be produced in one or more multilayers.

In another aspect, the present invention is characterized in that the addition of 0.01 to 10 parts by weight of the fragrance material to absorb the fragrance to the porous material with respect to 100 parts by weight of the composition, the duration of the fragrance using the porous material is long, other materials It is characterized by minimizing the transition to.

Looking at the present invention in more detail as follows.

In the present invention, the polyethylene resin is a mixture of low density polyethylene and linear low density polyethylene, and the melt index is suitably in the range of 1.0 to 7.0 g / 10 minutes (measured at 190 ° C and 2.16Kg according to ASTM D 1238-70). Do. If the melt index is less than 1.0 g / 10 minutes, it is difficult to obtain a film of the desired characteristics because it is applied to the machine, and when the melt index exceeds 7.0 g / 10 minutes, the physical properties of the film is too weak to be used as a product.

In the present invention, the low density polyethylene resin is preferably used in the range of 6.0 ~ 7.0 g / 10 minutes for the productivity of the film, the content of 5 to 10% by weight of the total composition is used. When the amount is less than 5% by weight, it is not preferable that the neck-in of the film is generated a lot, and when it is used in excess of 10% by weight, the film property is deteriorated. Therefore, it is good to use in the said range from the point which can maintain the productivity and physical property of a film.

In the linear low density polyethylene resin of the present invention, the range of 2.0 to 4.0 g / 10 minutes may be used to produce a film without mechanical or other deterioration of physical properties. The content of the linear low density polyethylene resin is 30 to 30 in the total composition. Use 50% by weight, it is difficult to maintain the physical properties of the film when used less than 30% by weight, the film production rate is lowered, in the case of more than 50% by weight because a lot occurs in the film production machine the above range It is good to use as. In particular, the linear low-density polyethylene is good when the C6, C8 linear low-density polyethylene is used, the mechanical properties of the film and the blendability of the inorganic material.

In addition, in the present invention, when using 1 to 10% by weight of ethylene-ethyl acrylate copolymer (EEA) in the composition has been found to have an effect of significantly reducing the pinhole, ethylene vinyl acetate (EVA) and the like can also be used.

Inorganic fillers suitable for the present invention include calcium carbonate, silica, barium sulfate, magnesium sulfate, calcium sulfate, talc, kaolin, aluminum hydroxide, magnesium hydroxide, zinc oxide, alumina, titanium oxide, mica, zeolite, diatomaceous earth, magnesium carbonate, cray Any one or more selected may be used. Examples of the inorganic filler include plate, needle and sphere, but spheres are most preferred, and the average particle diameter is in the range of 0.1 to 5 µm, preferably 0.5 to 3 µm. If the average particle diameter is less than 0.1 mu m, the inorganic filler is difficult to disperse in the resin, so that the mechanical properties deteriorate. If the average particle diameter exceeds 5 mu m, the surface appearance is poor. In addition, the inorganic filler may be used without coating or coated with stearic acid fatty acid.

In the present invention, the fragrance material is to absorb the fragrance in the porous material, the porous material is any one selected from a porous polyolefin-based resin or zeolite, silica, diatomaceous earth, pearlite, clay, shells having an average particle diameter of 3 ~ 5 ㎛ The above-mentioned porous inorganic material may be used, and when the surface polarization of the porous material is lowered by surface treatment using a cationic surfactant having 10 to 20 carbon atoms on the surface of the porous material, more preferable physical properties are shown. The porous polyolefin-based resin can be prepared by a method such as known in US4247498, and commercially available ones can be used as MEMBRANA's MP100 (the apparent specific gravity is 0.13 g / cm 3, and the impregnation ability of the additive is 75%). .

In the present invention, the content of the fragrance substance is preferably used in an amount of 0.01 to 10 parts by weight of the total weight of the composition, when used less than 0.01 parts by weight is insignificant, when used in excess of 10 parts by weight is not economical.

The fragrance of the fragrance material is garlic, galvanam, guiakwood, grapefruit, nutmac, neroli, niauri, dill, lavandin, lavender, lavenda spike, lilac, lime, lemon, lemongrass, rosemary, rosewood , Lichea Cubeba, Lindenbloom, Marjoram, Mandarin, Myrtle, Meritza, Myrrh, Violet, Basil, Verbena, Birch, Bay, Vetiver, Belgamm, Black Pepper, Cypress, Sandalwood, Santolina, Wormwood, Pine needles , Sage, cerery, spearmint, cinnamon, cedarwood, citronella, anise star, anised, amelis, benzo, angelica, yarrow, elemi, orange, origami, yukari, frankincense, fungus, immortel , Rose, Jasmine, Geranium, Juniper, Ginger, Cardamom, Cayuput, Chamomile, Campa, Caryway, Carrotseed, Clariesage, Clove, Coriander, Cumin, Taragon, Thyme, Tazetiz, Tangerine, Terebin, Tea tree, parsley, pine, pastry, fur, It is possible to use raw or oily or artificial flavors extracted from palmaza, petigren, peppermint, fennel, pimento, hissop, herbal medicines, but not limited thereto. The manufacturing method is used to impregnate the porous material with the fragrance stock solution or oil by using a mixer to absorb the fragrance.

At this time, the fragrance is not limited because it can be used to adjust the content as necessary, preferably 1 to 100 parts by weight based on 100 parts by weight of the porous polyolefin resin or porous inorganic material.

In the present invention, by using a method of impregnating the fragrance into the porous material of the porous material by mixing the porous polyolefin-based resin or porous inorganic material by adding a fragrance undiluted solution or oil in a dry method, it is possible to minimize the loss of fragrance It can be effective. In other words, in order to add a fragrance in order to add a fragrance to the non-porous general resin was prepared by using a master batch, this method is already used in the production of the master batch because the resin is melted by heat to prepare a fragrance master batch The fragrance is dissipated and is lost, and because the heat is applied once more during film production, the fragrance is further lost.

However, in the present invention, since the fragrance is added to the porous polyolefin-based resin or the porous inorganic material by the dry method, heat treatment is not required, and thus the fragrance is not lost. Therefore, the fragrance material according to the present invention can be minimized that the fragrance is lost because the heat is applied only once by mixing with the composition after the composition for preparing the film production, before extrusion into the film, there is an effect that is maintained for a long time.

In particular, when the porous polyolefin-based resin is used, the period of incense is long since the supporting ability of the fragrance is superior to that of the porous inorganic material, and it is more preferable because it has excellent miscibility with the composition for manufacturing a film.

Furthermore, when the breathable film is manufactured in a multi-layer, not only the pinhole is reduced but also the fragrance material is better preserved, the fragrance can be kept longer.

In the present invention, any one or more additives selected from conventional stabilizers, antioxidants, UV absorbers and wetting agents, lubricants, and the content thereof is preferably used in the range of 1 to 5% by weight.

In addition, the titanium dioxide is used to increase the whiteness or hiding power of the film can provide excellent hiding power when used in combination with other preparations. The other preparation can be used according to the user's desired physical properties, so the formulation is not limited significantly.

A method for producing a film using the above composition will be described. The low density polyethylene, linear low density polyethylene, ethylene-ethyl acrylate copolymer, inorganic filler, and other preparations are mixed and introduced into a conventional blender or mixer and mixed. As the mixer, a drum dumbler type mixer, a ribbon blender, a Henschel mixer, a super mixer, or the like may be used. A high speed stirring mixer such as a super mixer is preferable. Next, the mixture is kneaded, which is suitably carried out by a conventionally known apparatus, for example, a conventional single screw extruder, a twin screw extruder, a balvarie mixer, a twin screw kneader or the like. The kneaded resin composition is then pelletized. The resin composition pellets are kneaded and extruded into a multi-layered T-die to prepare a multilayer film. The film is prepared as described above and stretched by a roller or according to a conventional method such as tendering. Stretching is performed at a magnification of 1.1 to 3.0 in at least one axis or biaxial direction.

In addition, the present invention is prepared by pellets using the composition, and then kneaded by further adding a fragrance material absorbed aroma to the porous material during kneading extrusion to prepare a film using the T-die of the multi-layer structure, the intermediate layer Only the fragrance material is added to prepare a multi-layer film that can last a long time. In addition, it is good to make the fragrance material well mixed with the composition by lengthening the kneading time, and it is effective to maintain the fragrance for a long time by adding the fragrance material when kneading.

In addition, the present invention is not manufactured in a multi-layer as described above, it is also possible to knead by adding a fragrance material absorbing the fragrance to the porous material to the composition and to prepare a single film using a single T-die. In the present invention, by using a porous polyolefin resin, even in the case of manufacturing a single film has an excellent effect of sustaining the fragrance, the porous polyolefin resin is excellent in compatibility with the composition for breathable film evenly distributed, there is a feature that does not aggregate. .

Hereinafter, the present invention will be described in more detail with reference to the following Examples, but the scope of the present invention is not limited to the following Examples.

Physical properties of the film according to the following Examples were measured as follows.

[Pinhole]

Recorded by a pinhole autodetector installed before the film was wound, the number of pinholes per 4000m.

[Scent]

In the sensory test, each sample was placed in an airtight container, and after seven hours, the intensity of the fragrance was recorded in seven people.

[Production Example 1]

Porous Polyolefin  Used Fragrance  Produce

To 100 parts by weight of the porous polyolefin resin (MP100, MEMBRANA) having a bulk density of 0.13 g / cm3 and impregnating ability of the additive, 50 parts by weight of the stock solution extracted from jasmine was dry mixed at room temperature at room temperature. Prepared.

Example 1

Three layers of breathable film production

After mixing the base resin and the additive according to the prescription shown in Table 1 and then mixing with a super mixer, melt-kneading at 150 ℃ using a twin-extruder to prepare pellets, this is a multi-layered structure connected to three extruders It melt-extruded at the temperature of the T-die of 230 degreeC, and shape | molded into three layers of films. This film was stretched between the preheat roller and the stretching roller heated to 60 ° C. to obtain a film having a basis weight of 18 GSM. The physical properties of the thus prepared film were measured and shown in Table 2 below.

Example 2

On the third floor Smell  Breathable film manufacturers

After mixing the base resin and the additives according to the formulation shown in Table 1, and then mixed with a Henschel mixer, melt-kneaded at 150 ℃ using a Twin Extruder to prepare a pellet. The extruder was melt-extruded at a temperature of 230 deg. At this time, 1 part by weight of the fragrance impregnation resin prepared in Preparation Example 1 was introduced into the extruder connected to the middle layer of the multi-die in the multi-layer, and kneaded and extruded to form a film.

The three-layer film thus prepared was stretched between the pre-roll roller and the stretching roller heated to 60 ° C. to obtain a film having a basis weight of 18 GSM. The physical properties of the thus prepared film were measured and shown in Table 2 below.

Example 3

One layer Smell  Breathable film manufacturers

After mixing the base resin and the additive according to the prescription shown in Table 1, 1 part by weight of the perfume-impregnated porous polyolefin resin prepared in Preparation Example 1 was mixed with a Henschel mixer, and then at 150 ° C. using a Twin Extruder. Pellets were prepared after melt kneading. It melt-extruded at the temperature of the tee die at 230 degreeC, and shape | molded into one layer of film.

The film of one layer thus prepared was stretched between the pre-roll roller and the stretching roller heated to 60 ° C. to obtain a film having a basis weight of 18 GSM. The physical properties of the thus prepared film were measured and shown in Table 2 below.

Comparative Example 1

After mixing in a super mixer according to the formulation shown in Table 1, using a twin-extruder melt-kneaded at 150 ℃ to prepare a pellet, melt extrusion at 230 ℃ in a Ti-die extruder to form a film It was. This film was stretched between the preheat roller and the stretching roller heated to 60 ° C. to obtain a film having a basis weight of 18 GSM. The physical properties of the thus prepared film were measured and shown in Table 2 below.

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Comparative Example 3

After mixing in a super mixer according to the prescription shown in Table 1, melt-kneaded at 150 ° C. using a twin-extruder to prepare pellets, and the stock solution extracted from jasmine in 100 parts by weight of the melt of polyethylene resin. Was added in an amount of 25 parts by weight, 2 parts by weight of a fragrance masterbatch melt-mixed at 150 ° C. and melt-extruded at 230 ° C. in a Ti-die extruder to form a film. This film was stretched between the preheat roller and the stretching roller heated to 60 ° C. to obtain a film having a basis weight of 18 GSM. The physical properties of the thus prepared film were measured and shown in Table 2 below.

TABLE 1 Composition of film

LDPE 960: Hanwha Chemical, 6.0MI, 0.920 g / cc

LLDPE HS 1700, Hanwha Petrochemical, 3.2 MI, 0.923 g / cc, Copolymer Hexene

EEA A702: DUPONT-MITSUI POLYCHEMICAL, 5.0MI, 0.930g / cm3, EA 10%

CaCO ₃ : Average particle size 2㎛

Additive: TiO ₂ / Antioxidant-IRGANOX 1010 / Znic stearate with lubricant (1: 1: 1 weight ratio)

[Table 2] Film Properties

As shown in the above table, in the embodiment of the present invention, when manufacturing a multilayer film using EEA, it was found that the pinholes were significantly reduced as compared to the comparative example of one layer, and other physical properties were also improved. . In addition, in the case of Example 3 manufactured as a single layer it can be seen that the number of pinholes is reduced compared to the comparative example, it was found that other physical properties also improved.

In addition, when the aromatic material according to the present invention in which the aromatic material is impregnated with the porous material in Examples 2 and 3, the duration of the fragrance is longer than that of Comparative Example 3 prepared by the conventional aromatic master batch. Could know.

Multi-layer film using the composition according to the present invention is significantly reduced pinholes, by using a porous material to mix the fragrant raw materials at room temperature can minimize the loss of the fragrance, can reduce the cost, the fragrance in the manufacture of breathable film The duration of the effect is long, and when manufacturing a multi-layer, it is possible to minimize the phenomenon that the fragrance is transferred to other materials can provide an economical breathable multilayer film.

Claims (5)

5-10 wt% low density polyethylene, 30-50 wt% linear low density polyethylene, 40-60 wt% inorganic filler, 1-10 wt% ethylene-ethylacrylate copolymer (EEA), 1-5 wt% titanium dioxide, To prepare a composition comprising 1 to 5% by weight of the preparation, add 0.01 to 10 parts by weight of the fragrance absorbing aroma to the porous polyolefin resin with respect to 100 parts by weight of the composition, and further use a T-die or blown extruder. Or the air permeable film which pinhole reduction and aroma last for a long time characterized by extending | stretching uniaxially or biaxially, extrusion into one or more layers of film. delete The method of claim 1, The inorganic filler is selected from calcium carbonate, silica, barium sulfate, magnesium sulfate, calcium sulfate, talc, kaolin, aluminum hydroxide, magnesium hydroxide, zinc oxide, alumina, titanium oxide, mica, zeolite, diatomaceous earth, magnesium carbonate, cray Breathable film, characterized in that more than one pinhole reduction and long-lasting fragrance. The method of claim 1, The fragrance material absorbs the fragrance into the porous polyolefin-based resin and then surface-treats it using a cationic surfactant having 10 to 20 carbon atoms on the surface, thereby reducing the surface polarity of the porous material and maintaining the fragrance for a long time. Breathable film. The method of claim 1, The scents are garlic, galvanic, guaiwood, grapefruit, nutmac, neroli, niauri, dill, lavandin, lavender, lavenda spike, lilac, lime, lemon, lemongrass, rosemary, rosewood, lichea ku Beba, Lindenbloom, Marjoram, Mandarin, Myrtle, Meritza, Myrrh, Violet, Basil, Verbena, Birch, Bay, Vetiver, Belgamm, Black Pepper, Cypress, Sandalwood, Santolina, Mugwort, Pine needles, Sage, Sage Larry, spearmint, cinnamon, cedarwood, citronella, anise star, anised, amiris, benzoin, angelica, yarrow, elemi, orange, origami, yukari, frankincense, mockup, immortel, rose, jasmine , Geranium, Juniper, Ginger, Cardamom, Cayuput, Camomile, Campa, Carriage, Carrotseed, Clarisage, Club, Coriander, Cumin, Taragon, Thyme, Tazetiz, Tangerine, Terebin, Tea Tree, Parsley , Pine, pastry, fur, palmaza, fe Glenn, peppermint, fennel, pimento, great soap, a stock solution extracted from one selected from medicinal herbs or oil-type or pin hole, characterized in that the artificial hyangin of reduced flavor and which persists long breathable film.